I'm not saying that's how he BECAME.
That's how they kept him alive, as in, when he was all messed up non-cyborg dude, through blood transfusions.
Granted, this was from Star Wars: Visionaries, not quite the most canon work on the planet, but I see no reason why Dooku wouldn't use blood from a Jedi Master to give him that, you know, extra pow.
In any case, he DID give Grievous Sifo-Dyas' lightsabre.
Last edited by arkodeon; 01-28-2006 at 08:29 PM.